BREAKING NEWS - A wild car chase on local east Bronx highways ended with a ramming and a fatal stabbing by an enraged ex-boyfriend.

Police sources said the ex- caught the couple coming out of a Boston Road motel early Wednesday morning, and chased them on local highways.

He finally caught up with them on the westbound Pelham Parkway at the entrance ramp to the northbound New England Thruway, where he rammed his taxi into their SUV, tipping it over on the driver’s side.

Cops said he then jumped out, ran up to the SUV and stabbed the 20-year-old victim with a large kitchen knife multiple times in her in the chest, neck and face, as the driver, still strapped in to his seat belt watched helplessly.

“She’s in the motel, they come out and they see the boyfriend. He’s actually walking into the office area of the motel. They jump into their car and take off, he jumps into his car and starts to chase them,” said a police source. “He forces the car off the road, it tips over, he goes up and stabs her as she’s trapped in the car.”

The suspect remained at the scene, police said. He was brought to the 45th Precinct stationhouse for questioning, and was placed under arrest.

Police said he was charged with murder, criminal contempt and possession of a deadly weapon.

He was identified as 31-year-old Doines Espinal, 31, who was driving one of the city’s new green outer borough taxis, which are allowed to pick up street hails only in the outer boroughs.

The mother of his two-month old daughter, Katherine German of Parkchester, and her new lover sped away from the Paradise Motor Inn on Boston and Gun Hill Roads in a 2013 Honda Pilot shortly before 4 a.m., cops said, with her ex-lover chasing them in the Toyota livery cab.

The couple was about to feed on to I-95 north-bound when cops said Espinal rammed the Pilot from behind with such force that went over a concrete barrier, landing on its side on an adjacent bike path.

EMS workers who responded pronounced the young victim dead at the scene. The driver of the Pilot, identified as Jose Jiminez, 28, of Yonkers, sustained minor cuts as a result of the vehicle accident, and refused medical attention, police said.

The accident backed up traffic for miles – and hours – into the late afternoon as police conducted their investigation at the scene.

Authorities said German had an order of protection against Espinal. They split up after he was arrested in May after beating her up. It was unclear if the order of protection was still in effect.

The Daily News reported that co-workers at the Kiss Car Service where Espinal worked blamed German for his hack license being temporarily suspended after his assault arrest.